For 4x4 the cheapest suspension lifts start at about $1500 and they are made by Superlift. They go up from there depending on the manufacturer.
What most of us do is install a Body Lift. They are 3 inch blocks that raise the body of your truck off the frame. They cost less than $300 and allow you to fit 33 inch tires.
Pick your favorite
Here is a link with some pictures. Mine is the blue on with 295/75/16 (33 1/2 x 11.5) and my buddies silver truck with 33x12.50 tires. Both have 3 inch body lifts.
2002 XLT 4.0, 3"BL, 295/75/16 Nitto Terra Grapplers, K&N FIPK, XCAL 2 w/LaSota Racing Tune, 2 12" Alpine subs, Alpine Deck, Cobra CB, Low Pro Tool Box, Straight Pipe Exhaust, Blacked out heads/corners, Expo OHC/Dome/Cluster, etc...
2011 F-150 XLT, 5.0 Coyote, Hell Bent Steel Leveling Kit, 15% Tint, Flo-Pro Super V Exhaust, MA Audio 1000w amp, 10" Sony Sub